OPERATING INSTRUCTIONS RH 40 E

Inspection and servicing

AIR-INTAKE SYSTEM

Read and observe the "EngineSafety instructions" chapter.

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Clean or renew main filter element only if the vacuum-meter nindication changes to "RED" with the engine running at high speed.

Risk of injury caused by rotating or hot parts of the engine.

Shut off the engine before working on the airintake system.

Secure the machine as described in the "Securing the machine" section.

Do not start the engine when parts of the air-intake system have been detached.

Engine damage may occur if the engine is allowed to draw in unfiltered air.

The air-intake system is equipped with two dry-air filter (Fig. 3-23:) consisting of main and safety filter element.

Removal and installation

" Unscrew nut (1, Fig. 3-23:) and remove cover (2).

" Unscrew nut (3, Fig. 3-25:) and withdraw main filter element (4). Do not loose the washer under nut (3).

" Clean or renew main filter element only if the vacuummeter indication changes to "RED" with the engine running at high speed.

New or cleaned main filter elements should always be at hand to shorten excavator downtimes.

Main filter elements

An insufficient air-intake performance, caused by a contaminated main filter element, is indicated by the vacuum-meter (8, Fig. 3-24:).

Operating Instructions Rh 40 E

Inspection and servicing

" Before installing the filter element, clean contact faces at cover (2, Fig. 3-26:) and at filter housing.

" Put on cover (2) and tighten nut (1).

During the removal of the main filter element, the safety element (5, Fig. 3-27:) must remain in the filter housing.

Replace damaged or deformed elements immediately.

Check element seal. When the seal is damaged, the filter element must be replaced, too.

Cleaning with compressed air is suitable if the filter element is to be re-used immediately.

Checking and cleaning the main filter element

Examine the filter paper of the element with a lamp which is introduced into the element (Fig. 3-28:). Any damage is then clearly visible.

Blow filter element (Fig. 3-29:) clean with dry compressed air from the inside by moving the compressed-air gun up and down.

The pressure at the nozzle must not exceed 6 bars.

Cleaning is terminated when all visible dust has been blown out of the filter element.